Recovery of corneal sensation after myopic correction by laser in situ keratomileusis with a nasal or superior hinge

J Cataract Refract Surg. 2003 Apr;29(4):757-61. doi: 10.1016/s0886-3350(02)01840-0.


Purpose: To measure corneal sensitivity after laser in situ keratomileusis (LASIK) to determine the time required for recovery of this parameter.

Setting: Ohshima Hospital of Ophthalmology, Fukuoka, Japan.

Methods: Corneal sensation was measured with a Cochet-Bonnet-type esthesiometer in 75 patients before and 1, 3, 6, and 12 months after correction of myopia by photorefractive keratectomy (n = 21) or LASIK (n = 54).

Results: Photorefractive keratectomy did not affect corneal sensation. In the LASIK group, a large and significant decrease in corneal sensitivity was apparent at 1 month (P<.05). Although corneal sensitivity appeared to have recovered slightly at 3 months, it remained significantly decreased (P<.05). By 6 or 12 months, the corneal sensitivity in LASIK patients was not statistically different from the preoperative values in the study patients. A significantly greater decrease in corneal sensitivity was apparent in the LASIK patients with a nasal hinge than in those with a superior hinge (F = 7.54, P<.01). Corneal sensitivity was in the normal range in 31.5% of LASIK patients at 3 months and in 57.4% and 82.1% at 6 and 12 months, respectively.

Conclusion: Recovery of corneal sensation had begun 3 months after LASIK and appeared complete after 12 months.

Publication types

  • Comparative Study

MeSH terms

  • Adolescent
  • Adult
  • Cornea / physiology*
  • Female
  • Humans
  • Keratomileusis, Laser In Situ / methods*
  • Lasers, Excimer
  • Male
  • Middle Aged
  • Myopia / physiopathology*
  • Myopia / surgery*
  • Photorefractive Keratectomy / methods
  • Recovery of Function
  • Sensation / physiology*
  • Surgical Flaps*
  • Time Factors